Warren is Michigan's third-largest city. It enjoys a diverse tax base and a diverse population. Major employers such as General Motors, Chrysler, and St. John Macomb Hospital have invested over $2 billion in facilities over the last decade. Warren is also home to Macomb County Community College. TACOM, the heart of the region's defense corridor, is located in the middle of Warren and experiencing significant growth. Warren welcomes new people and new businesses.